JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M12 x 1.25 Face Mill Arbors with robust materials and build

with robust materials and build that stand up to daily use and long-term performance

Finished to ISO H5 tolerance within the DIN 8051 B standard

The combination of M35 cobalt content and a left-hand spiral flute paired with right-hand cutting provides predictable performance in precision reaming while maintaining compatibility with standard straight-shank setups

repeatable hole sizes (to ISO H5) with fewer passes

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M12 x 1.25 Face Mill Arbors with robust materials and buildThe JBO Thread Ring Gauge GO Metric Fine, Right Hand, 6g, M12 x 1. 25 is a precision tool designed to verify external thread sizes quickly and reliably. Its ideal for engineers, machinists, quality inspectors, and shop staff who need to confirm that threaded components meet exact specifications in production, assembly, or maintenance tasks. Crafted from hardened steel for durability, it resists wear in busy environments and maintains its accuracy over